What is the best way to create a screen capture of a webpage using a URL?

Currently working on a Spring MVC website project, I have implemented a form requesting the user's website URL. Once entered, I aim to display a screenshot of the specified website for the user to view.

Contemplating whether to generate the image on the backend or frontend.

Essential to show the website image on the user's dashboard, there is uncertainty regarding whether to produce it dynamically each time or store it within the backend database. While saving it in the backend may benefit performance, generating it live would provide the most up-to-date information to the user.

javascriptspring

Answer №1

If you're looking to generate PNG screenshots using the command line, check out PhantomJS.

Below is a script for PhantomJS that takes two input arguments (URL and output file):

var page = require('webpage').create();
var args = require('system').args;

var web_url = args[1];
var file_name = args[2];

page.viewportSize = { width: 1200, height: 1602 };
page.clipRect = {top:0, left: 0, width: 1200, height: 1602 };

page.open(web_url, 'GET', function () {

page.evaluate(function() {
    document.body.bgColor = 'white';
});
var ret = page.render(file_name);

var exitcode = 0;
if(ret) exitcode = 1;

phantom.exit(exitcode);
});

You can call PhantomJS by running this command:

phantomjs scriptfile.js http://www.myweb.com outputfile.png

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